Attachment for talking-machines.



F; W.I SCHMIDT.

ATTACHMENT-FOR TALKING MACHINES.

nn'maxqmn FILED MAR. e, 1911. 1,001,171, Patented Aug. 22, 1911;

2 SHEETS-SHEET 1.

WITNESSES @cZ/W; QMW KM NVENTOR ATTORNEYS 50 "Similarnumerals ofreference innnnnicx' 's'cniirinr; orrn nnnnnrnm, rnm isiznvnnm.

hmncmuniv'r roe. T'A KINe MAcniNna V Specification of Letters Patent.'22, 191i.

Application filed arch's, 191 1. Serial It'd-613,028,

rtelzfwlmemey 06mm 'Be' it known that I, FREDERICK W.

a citizen of'the' United: States, ie- I sid ng f in the city and countyof PhiladelphiafState' of Pennsylvania, have invented Ilew and usefulAttachment for framing- Machines,of hich the following is a specifi ti gMy'in'vention consists of van improved at- Y whereby the machine isstopped when the stylus a --record; o

y It -further consists of such apparatus which may be attached to'atalking machine 'without rfequiring records of special constlfllctioninvf .5 I t' fin ther conists of other novel features of constructiom-allas will be hereinafter fiilly set forth. a

" 7 For the purpose of illustrating my inven- 'tion,- I have shown inthe accompanying drawin s one formithereof which is at pres,

i cut pre erredby me, since thesame has been results,although it is toheunderstood that'the various instrumentalities of which my inventionconsists can he variously arranged and organized and thatmy invention isnot limited to the precise arrangement and organization of these"instrumentalities as herein, shown and described. a V

Figure 1 represents a perspective view of as muhh of a-talking machineas will illustrate the application of my invention to the same. Fig. 2represents: a .diagrammatic' Pla n-view." of the tone-tube, sound-box,turntable and record ofa talking machine, illustra'ting my improvementin place and dia grammatically illustrating the electrical connections.Fig. 3 represents a perspective view of the slotted finder bar ofattachinent. Fig. 4 represents a perspective .view of the brake hox.-'-Fig. 5 represents agpl'an viewof the-'brake-mechanism. Fig. 6 represemena'xialsection of the brake-cylinder,

brake-lolock and contacts: Big. 7 represents 'ga-verti'eal section ofthe postupon vvhich the slotted barisadjustably'secured;

indicate corresponding 'pairts in the figures Referring to thedrawings,the numeral. indicates'the cabinet of atalking: machine, uponthe top of which-is the record-carrier or turntable, 53, carrying therecord, 3,- A

rrives at the end of the groove in the found in practice to givesatisfactory and rethe cabinet and carries the tapering" tonetube,"6,and the horn-elbow, 6. A soundbox'; 7, is supportedat the free end "ofthe tone tube, ands'uit'ably carries the stylus. or needle, 8. All ofthese parts are of the usual or of any suitable construction, such asfound in the"" well-known forms of talking I machines. 15 tachment forsound reproducing mach nes,

A hollow post,'9, is secured upon the top ofthe cabinet, and a splitplug, 10,-having a shouldered head, 11', fits in the bore of said post,I A clamping thumb..-screw,z.12, is threaded into the top of the head ofcl1e. plug, tmd serves to clampa'flat finder bar, 13, having? alongitudina1 slot, 14, with which it is 'mova'ble upon theshank ofthescrew. Near its "free end this flat bar can ries a stud,15, throughwhich passesa con tact screw, 16. The'outer end ofjthe' flat, barprojects laterally, in L-shapey'ahd ahead,

17', is provided at [the extreme ofthe L, and

has a needle, .l8,-secured in it by asetscrew, 19.

A base-plate, 20, is secured upon'the top. of the cabinetand'tofoneisideof the;turn-I table, and hasa cover, 21;, forming area'-tangular brake-box. A brekecylinder, or casing, 22, is secured upon saidbase plate and in electrical contact with thesame .a'ndv a plunger,'-23,fits to slidewithin it and has a pin, 24,]projecting through a, slot, 25,gin

laterally projecting tooth,; 26, "which projects through a longitudinalslot in theside of -the cylinder. A brake-plug, 2?,-

of leather, fiber, or other suitable inateriahfits in a socket in theend of the piston,- to engage the rim=of the turntable to, stopitsrotation when the piston is pforcedoutwardv hy a coiled spring,- 28,within the boreof the cylinder and bearing against the piston. 1 Theopposite end of thebrakescyl-inder-is closed by- :a plug, which confinesthe springanda flanged sle eve, 30,, of insulating,

Inaterialfits in arterial bore in said;p lug..

pin, 3,1,.fits in the bore-offthisjsleeue and i has ,1 a contact-poi nt,32, -up'on;.=its inner, end

and a "head/33, upon its ,outernend A headed pin, 34, has playinan,axialbore,35,

in the braliefpiston, and. is held from slip-i ping out at, the ;innerend of said-bore by the latter having .acontracted inner end. Saidheadedpin has a, contact point, 36,;at

I hi ackeue, projects upward from one side of i the upper side of thebrake cylinder, and a to the contact-point of the stationary pin, and aspring, 37, serves to. force the head of the movable pin against thecontracted end of the here. The laterally projecting} tooth upon thebrakepiston will engage a detentuiotch, 38, in-the armature, 39, ofelec.-.

' tro-1na nets 39* when the brake. aistonis moved inward. The cover forthe brakemechanism has an opening, 4:0, in its-side, through which theend of the brake-p1ston and its plug may project, and a slot, 41, in

its top, thi' ough which the uprightpin upon 'the brake-piston projectsand in which it slides. The end. of this pin is engagedby a slot in theend of a thumb-lever, 42, pivoted upon the cover, and by means of whichlever the brake may be set. v

One terminal, 43, of a battery, 4:4,is con- 'nected to the head of thestationary'contact pin in the brake-cylinder, and the other terminal,47, is connected to the tone-tube of the talking machine.. The slottedbar and its post is connected by a wire, 45,'to one terminal, d6',.ofthe; magnet windings, and the other terminal is grounded, at 48, to

the base-plate of the. brake-mechanismand thus to the brake-cylinderandpiston.

In practice, the slotted finder bar is adjusted by means of theclamp-screw to bring the pin. above the blank central space of therecord. When a record, is placed on the turn-table, the finder bar ismoved laterally until theneedle at "the end of-the bar can engage theend of the last groove upon the record when depressed, the needle beingnormally out of contact with the record. As

now the sound-box and tone-tube are moved inward by the needle-followingthe spiral groove in the record, the sound-box will at.

last make contact with the contact screw upon the bar, as the needlereaches'the end 'ofthe groove. -This will close the circuit 1 throughthetone-tube'and slotted arm, causing the circuit to pass from the battery,through the wire, 4:7, to the tone-tube andsound-box, through thecontact-screw and slotted arm and the wire to the electromagnets. As thebrake-piston and plug have been retracted into the cylinder by means ofthe thumb-lever, the stationary and yielding contacts are in contact, sothat the current passes through the magnet windings,

through the base-plate,- through the brakecylindcr, piston and contactsand back to the "battery through the insulated stationary contactandwire, 43. The magnets are'thus in contact. The yielding contact in thebrake-cylinder admlts of the points remaining' in contact and thecurrent remaining unbroken 'aftcr'the brake-piston has started forward,thereby preventing the armature from being released until after thetooth on the brake-pistonhas.fully cleared the de- Itent-notchf in thearmature;

. By thepmployment of this'deviceya talking machinemay be, promptlystopped at 'the end. of the 'pieceit is playing, thereby preventing thehoarse-and rattling sound of thefnedle traveling over the blank portionof the rficord and saving the record, without obliging' the operator towatch the machine and stopping it at the end of the picce,the actionhere being entirely automatic. The distance between the pointer needleand the contact screw upon the slotted arm equals that between the pointof the needle on the sound-box and the point where the latter contactswith the contact screw, so that the machine may be stopped with greataccuracy if the pointer needle has been set over the end of the lastturn of the spiral groove,

in the record before the machine is started. The contact-screw may beadjusted to adapt it to make contact with different styles of 1sound-boxes at the proper point. After the bar has once been adjusted bymeans of the slot and the clamping screw, accordingftt the size of themachineto which it is'gapa plied, and after the contact-screw has beenadjusted, there will be no need forfurther' adjustments of the bar, andall that is necessary to do when a record is changed is to bring theneedle in register withthe end of the groove by swinging the arm acrossthe record until, by depressing the end of the bar, the needle strikessuch groove.

\Vhile a brake for the turntable has been illustrated and described itis evident that any suitable stopping device for "the machine may besubstituted.-

- Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

.1. In an electrical brake fora talking machine, an adjustable finderbar carrying a contact device adapted to predeterinine the actuation ofthe brake at the close of the reproduction automatically uponpositioning of said finddr bar, a sound-box arm and an electric circuitconnecting said contact device and sound box arm.

2.- In an electric brake for a talking machine, a normally open electriccircuit having one terminal connected to the sound-box of atalking'machine, a finder bar pivoted at one. end upon a fixed portionof the machine to swing across the record and having at its free end adownwardly-pointing necdle which may engage the record when the bar isdepressed and a contact at a distance from the point of said needleequalto the distance from the point of the stylus. of the sound-box tothe point of the latter where it will engage such contact, said barbeing connected to the other terminal of the en'- cuit, and anelectrically actuated brake device in the circuits for stopping themachine.

3. In an electric brake for a talking machine, a normally open electriccircuit having one' terminal connected to the soundbox of a talkingmachine, a finder bar pivoted at one'end'upon a fixed portion of themachine to swing across the record and having at its free end adownwardly-pointing needle adapted to engage the groove in the recordwhen the arm is depressed, said bar being connected to the otherterminal of the circuit, a contact-screw in said bar and adjustable tobring its point to a distance from the point of the needle equal to thatbetween the point of the stylus in the soundbcx and the point of thelatter where it engages the contact-screw, and an electrically actuatedbrake-device stopping the machine.

i. In an electric brake for a talking main the circuit for chine, a"normally open electric circuit having 'one terminal connected to thesoundbox of a talking machine, a bar pivoted at one end upon a fixedportion of the machine to swing across the record-and having at its freeend a downwardly-pointing needle which may engage the record when thebar is depressed and a contact at a distance from the point of saidneedle equal to the distance from the point of the stylus of thesound-box to the point of the latter where it will engage suchcontact,'said bar being connected to the other terminal of the circuitand having means for adjusting it longitudinally and forsecuring it inits adjustment, and an electrically actuated bra kedevice 111 thecircuit for stopping the ma-

